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<?php

require_once "../init.php";

require_once BASE . "/lib/mysql.php";

$uri_parts = explode('/', $_SERVER['REQUEST_URI']);

if ($uri_parts[0] != '' || $uri_parts[1] != 'feeds')
  throw_http_error(422, 'Unprocessable Entity');

$last = array_pop($uri_parts);
if ($last != '')
  array_push($uri_parts, $last);

array_splice(
  $uri_parts,
  0, 2
);

// TODO
if ($uri_parts[0] == 'releases')
  throw_http_error(501, "Not Implemented", "Sry, the releases-feed is not yet implemented.");

if ($uri_parts[0] == 'packages') {

  array_splice(
    $uri_parts,
    0, 1
  );

// TODO: implement "added" and "removed" - but how?
//  $actions = array('' => '', 'added' => 'added', 'removed' => 'removed');
  $actions = array('' => '');
  $archs = array('all' => 'all');
  $result = mysql_run_query(
    "SELECT DISTINCT `architectures`.`name` FROM `architectures`" .
    mysql_join_architectures_repositories() .
    " WHERE `repositories`.`is_on_master_mirror`" .
    " ORDER BY `name`"
  );
  while ($row = $result -> fetch_assoc())
    $archs[$row['name']] = $row['name'];
  $repos = array('' => '');
  $result = mysql_run_query(
    "SELECT DISTINCT `repositories`.`name` FROM `repositories` WHERE `repositories`.`is_on_master_mirror` ORDER BY `name`"
  );
  while ($row = $result -> fetch_assoc())
    $repos[$row['name']] = $row['name'];

  if (count($uri_parts) > 0 && array_key_exists($uri_parts[0], $actions)) {
    $action = $uri_parts[0];
    $action_filter = 'unimplemented';
    array_splice(
      $uri_parts,
      0, 1
    );
  }
  else {
    $action = '';
    $action_filter = '`repositories`.`is_on_master_mirror`';
  }

  if (count($uri_parts) > 0) {
    if (!array_key_exists($uri_parts[0], $archs))
      throw_http_error(501, "Not Implemented", implode('/',$uri_parts));
    $arch = $uri_parts[0];
    $arch_filter = ' AND `r_a`.`name`="' . $arch . '"';
    array_splice(
      $uri_parts,
      0, 1
    );
  }
  else {
    $arch = '';
    $arch_filter = '';
  }

  if (count($uri_parts) > 0) {
    if (!array_key_exists($uri_parts[0], $repos))
      throw_http_error(501, "Not Implemented", implode('/',$uri_parts));
    $repo = $uri_parts[0];
    $repo_filter = ' AND `repositories`.`name`="' . $repo . '"';
    array_splice(
      $uri_parts,
      0, 1
    );
  }
  else {
    $repo = '';
    $repo_filter = '';
  }

  if (count($uri_parts) != 0)
    throw_http_error(501, "Not Implemented", implode('/',$uri_parts));

  $result = mysql_run_query(
    "SELECT MAX(`build_assignments`.`return_date`) AS `max_build_date`" .
    " FROM `build_assignments`" .
    mysql_join_build_assignments_binary_packages() .
    mysql_join_binary_packages_binary_packages_in_repositories() .
    mysql_join_binary_packages_in_repositories_repositories() .
    mysql_join_repositories_architectures("", "r_a") .
    " WHERE " . $action_filter . $repo_filter . $arch_filter
  );
  $max_build_date = $result -> fetch_assoc();
  $max_build_date = $max_build_date['max_build_date'];

  $result = mysql_run_query(
    "SELECT `binary_packages`.`pkgname`," .
    "`binary_packages`.`epoch`," .
    "`binary_packages`.`pkgver`," .
    "`binary_packages`.`pkgrel`," .
    "`binary_packages`.`sub_pkgrel`," .
    "`binary_packages`.`sub_pkgrel_omitted`," .
    "`architectures`.`name` AS `architecture`," .
    "`repositories`.`name` AS `repo`," .
    "`r_a`.`name` AS `r_a`," .
    "`binary_packages_in_repositories`.`last_moved`" .
    " FROM `binary_packages`" .
    mysql_join_binary_packages_binary_packages_in_repositories() .
    mysql_join_binary_packages_in_repositories_repositories() .
    mysql_join_repositories_architectures("", "r_a") .
    mysql_join_binary_packages_architectures() .
    " WHERE " . $action_filter . $repo_filter . $arch_filter .
    " ORDER BY `binary_packages_in_repositories`.`last_moved` DESC" .
    " LIMIT 50"
  );
  $packages = array();
  while ($row = $result -> fetch_assoc())
    $packages[] = $row;

  header('Content-Type: application/rss+xml; charset=utf-8');

  print "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
  print "<rss version=\"2.0\">";
  print "<channel>";
  print "<title>";
  print "Arch Linux 32: ";
  switch ($action) {
    case '':
      print "Recent package updates";
      break;
    case 'added':
      print "Recent added packages";
      break;
    case 'removes':
      print "Recent removed packages";
      break;
  }
  if ($arch != 'all')
    print " (" . $arch;
  if ($repo != '')
    print " [" . $repo . "]";
  if ($arch != '')
    print ")";
  print "</title>";
  print "<link>";
  print "https://www.archlinux32.org/packages/";
  print "</link>";
  print "<description>";
  switch ($action) {
    case '':
      print "Recently updated packages in the Arch Linux 32 package repositories";
      break;
    case 'added':
      print "Recently added packages to the Arch Linux 32 package repositories";
      break;
    case 'removes':
      print "Recently removed packages from the Arch Linux 32 package repositories";
      break;
  }
  if ($arch != 'all')
    print " for the '" . $arch . "' architecture (including 'any' packages)";
  else
    print " for all architectures";
  if ($repo != '')
    print " in the [" . $repo . "] repository";
  print ".";
  print "</description>";
  print "<atom:link href=\"https://www.archlinux32.org" . $_SERVER['REQUEST_URI'] . "\" rel=\"self\">";
  print "</atom:link>";
  print "<language>";
  print "en-us";
  print "</language>";
  print "<lastBuildDate>";
  print $max_build_date;
  print "</lastBuildDate>";
  foreach ($packages as $package) {
    print "<item>";
    print "<title>";
    print $package['pkgname'];
    if ($package['epoch'] != 0)
      print $package['epoch'] . ":";
    print $package['pkgver'] . "-" . $package['pkgrel'];
    if (!$package['sub_pkgrel_omitted'])
      print '.' . $package['sub_pkgrel'];
    print ' ' . $package['architecture'];
    print "</title>";
    print "<link>";
    print "https://www.archlinux32.org/packages/" . $package['repo'] . "/" . $package['r_a'] . "/" . $package['pkgname'] . "/";
    print "</link>";
// TODO: description
    print "<pubDate>";
    print $package['last_moved'];
    print "</pubDate>";
// TODO: guid
    print "<category>";
    print $package['repo'];
    print "</category>";
    print "<category>";
    print $package['r_a'];
    print "</category>";
    print "</item>";
  }
  print "</channel>";
  print "</rss>";

  die();

}

throw_http_error(501, "Not Implemented");